Such labor shall be performed in accordance with such rules as may be made by resolution of the board of supervisors, not inconsistent with the provisions of this chapter , and such labor shall not be leased. [C97, §5654; C24, 27, 31, 35, 39, § 5515; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §356.19 ] Referred to in §331.303